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Diffstat (limited to 'fs/xfs/linux-2.6/xfs_buf.h')
-rw-r--r--fs/xfs/linux-2.6/xfs_buf.h29
1 files changed, 19 insertions, 10 deletions
diff --git a/fs/xfs/linux-2.6/xfs_buf.h b/fs/xfs/linux-2.6/xfs_buf.h
index 383a3f37cf9..cbe65950e52 100644
--- a/fs/xfs/linux-2.6/xfs_buf.h
+++ b/fs/xfs/linux-2.6/xfs_buf.h
@@ -128,10 +128,15 @@ typedef struct xfs_buftarg {
/* per device delwri queue */
struct task_struct *bt_task;
- struct list_head bt_list;
struct list_head bt_delwrite_queue;
spinlock_t bt_delwrite_lock;
unsigned long bt_flags;
+
+ /* LRU control structures */
+ struct shrinker bt_shrinker;
+ struct list_head bt_lru;
+ spinlock_t bt_lru_lock;
+ unsigned int bt_lru_nr;
} xfs_buftarg_t;
/*
@@ -147,8 +152,6 @@ typedef struct xfs_buftarg {
struct xfs_buf;
typedef void (*xfs_buf_iodone_t)(struct xfs_buf *);
-typedef void (*xfs_buf_relse_t)(struct xfs_buf *);
-typedef int (*xfs_buf_bdstrat_t)(struct xfs_buf *);
#define XB_PAGES 2
@@ -164,9 +167,11 @@ typedef struct xfs_buf {
xfs_off_t b_file_offset; /* offset in file */
size_t b_buffer_length;/* size of buffer in bytes */
atomic_t b_hold; /* reference count */
+ atomic_t b_lru_ref; /* lru reclaim ref count */
xfs_buf_flags_t b_flags; /* status flags */
struct semaphore b_sema; /* semaphore for lockables */
+ struct list_head b_lru; /* lru list */
wait_queue_head_t b_waiters; /* unpin waiters */
struct list_head b_list;
struct xfs_perag *b_pag; /* contains rbtree root */
@@ -176,7 +181,6 @@ typedef struct xfs_buf {
void *b_addr; /* virtual address of buffer */
struct work_struct b_iodone_work;
xfs_buf_iodone_t b_iodone; /* I/O completion function */
- xfs_buf_relse_t b_relse; /* releasing function */
struct completion b_iowait; /* queue for I/O waiters */
void *b_fspriv;
void *b_fspriv2;
@@ -264,7 +268,8 @@ extern void xfs_buf_terminate(void);
#define XFS_BUF_ZEROFLAGS(bp) ((bp)->b_flags &= \
~(XBF_READ|XBF_WRITE|XBF_ASYNC|XBF_DELWRI|XBF_ORDERED))
-#define XFS_BUF_STALE(bp) ((bp)->b_flags |= XBF_STALE)
+void xfs_buf_stale(struct xfs_buf *bp);
+#define XFS_BUF_STALE(bp) xfs_buf_stale(bp);
#define XFS_BUF_UNSTALE(bp) ((bp)->b_flags &= ~XBF_STALE)
#define XFS_BUF_ISSTALE(bp) ((bp)->b_flags & XBF_STALE)
#define XFS_BUF_SUPER_STALE(bp) do { \
@@ -315,7 +320,6 @@ extern void xfs_buf_terminate(void);
#define XFS_BUF_FSPRIVATE2(bp, type) ((type)(bp)->b_fspriv2)
#define XFS_BUF_SET_FSPRIVATE2(bp, val) ((bp)->b_fspriv2 = (void*)(val))
#define XFS_BUF_SET_START(bp) do { } while (0)
-#define XFS_BUF_SET_BRELSE_FUNC(bp, func) ((bp)->b_relse = (func))
#define XFS_BUF_PTR(bp) (xfs_caddr_t)((bp)->b_addr)
#define XFS_BUF_SET_PTR(bp, val, cnt) xfs_buf_associate_memory(bp, val, cnt)
@@ -328,9 +332,15 @@ extern void xfs_buf_terminate(void);
#define XFS_BUF_SIZE(bp) ((bp)->b_buffer_length)
#define XFS_BUF_SET_SIZE(bp, cnt) ((bp)->b_buffer_length = (cnt))
-#define XFS_BUF_SET_VTYPE_REF(bp, type, ref) do { } while (0)
+static inline void
+xfs_buf_set_ref(
+ struct xfs_buf *bp,
+ int lru_ref)
+{
+ atomic_set(&bp->b_lru_ref, lru_ref);
+}
+#define XFS_BUF_SET_VTYPE_REF(bp, type, ref) xfs_buf_set_ref(bp, ref)
#define XFS_BUF_SET_VTYPE(bp, type) do { } while (0)
-#define XFS_BUF_SET_REF(bp, ref) do { } while (0)
#define XFS_BUF_ISPINNED(bp) atomic_read(&((bp)->b_pin_count))
@@ -346,8 +356,7 @@ extern void xfs_buf_terminate(void);
static inline void xfs_buf_relse(xfs_buf_t *bp)
{
- if (!bp->b_relse)
- xfs_buf_unlock(bp);
+ xfs_buf_unlock(bp);
xfs_buf_rele(bp);
}